Yaz-zichtgithub-plugin

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- Added: yaz plugin to scan the repository and update a google sheet
with separated by repo type
- Changed: the file structure to be more maintainable

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- Added: new task to scan the repository and summarize it

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- Added: new task update-repo
- Changed: renamed update-spreadsheet to update-all

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- Changed: references to yaz/yaz_zichtgithub_plugin because the
repository changed owner

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- Added: a tool to perform regexp search on repo files

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- Added: support for multiple worksheets
- Added: only use columns and rows marked with 'any'